MIPS: OCTEON: support disabling HOTPLUG_CPU run-time

If nosmp kernel option given, we can assume HOTPLUG_CPU is disabled.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7202/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/cavium-octeon/smp.c

@@ -84,6 +84,9 @@ static void octeon_smp_hotplug_setup(void)
 #ifdef CONFIG_HOTPLUG_CPU
 	struct linux_app_boot_info *labi;
 
+	if (!setup_max_cpus)
+		return;
+
 	labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
 	if (labi->labi_signature != LABI_SIGNATURE)
 		panic("The bootloader version on this board is incorrect.");
@@ -129,7 +132,7 @@ static void octeon_smp_setup(void)
 	 * will assign CPU numbers for possible cores as well.	Cores
 	 * are always consecutively numberd from 0.
 	 */
-	for (id = 0; id < num_cores && id < NR_CPUS; id++) {
+	for (id = 0; setup_max_cpus && id < num_cores && id < NR_CPUS; id++) {
 		if (!(core_mask & (1 << id))) {
 			set_cpu_possible(cpus, true);
 			__cpu_number_map[id] = cpus;